Alpha Pot LargeAlpha Pot Large Self Watering Planter Big, beautiful floor plants shouldn't be high maintenance. The 11 inch Alpha Pot Large uses our passive Alphaponics system to water statement plants for 710 days at a time so your indoor jungle looks effortless, because it is. Why it's different Large pots are heavy to lift and easy to over or under water. Alphaponics gives roots a generous sealed reservoir plus an oxygen gap, so big plants stay evenly hydrated